Spirulina
From Microcosm Aquarium Explorer
Spirulina tablets, a rich herbivore supplement. Perdita/Wikipedia
Popular name for edible blue-green algae (actually cyanobacteria in the genus Arthrospira, formerly called Spirulina) used as a nutrient-rich food or supplement for aquarium livestock, especially herbivores and omnivores.
Although it grows wild in many places around the world, Spirulina is now cultured and processed into flakes, pellets, tablets, and powder both for aquaculture rations and human uses.
It is high in protein, essential fatty acids, vitamins (especially C, D, E, and B1, B2, B3, B6, B9), and potassium. It also delivers a range of pigments important for supporting health and good coloration.